岛津玻璃柱PEG-20M:KOH:Chromosorb 102=4:1:100 工作场所空气有毒物质测定一甲胺和二甲胺

名称：玻璃柱
固定相：PEG-20M:KOH:Chromosorb 102=4:1:100
规格：2m*3mm

应用：工作场所空气有毒物质测定 第227部分：一甲胺和二甲胺

工作场所空气有毒物质测定 第227部分：一甲胺和二甲胺
本部分规定了工作场所空气中一甲胺和二甲胺的溶液采集-气相色谱法和溶剂解吸-气相色谱法。
本部分适用于工作场所空气中气态一甲胺和二甲胺浓度的测定。

浩瀚色谱（山东）应用技术开发有限公司建立工作场所空气中一甲胺,二甲胺的顶空气相色谱测定方法。方法酸性吸收液采集空气中的一甲胺、二甲胺,碱溶液中和后顶空进样气相色谱,经玻璃填充色谱柱分离,氢焰离子化检测器测定。结果一甲胺浓度范围为11.70～93.54μg/ml时,标准曲线回归方程为Y=0.458 1X-1.034 5(r=0.999 0);二甲胺浓度范围为10.59～84.74μg/ml时,标准曲线的回归方程为Y=0.864 5X-2.206(r=0.999 1)。一甲胺方法检出限为1.65μg/ml,低检出浓度为0.55 mg/m3(以采集15 L空气样品计);二甲胺检出限为1.54μg/ml,低检出浓度为0.32 mg/m3(以采集24 L空气样品计)。样品于4℃冰箱内可稳定保存5 d。结论该方法可同时测定工作场所空气中一甲胺和二甲胺浓度。

工作场所空气有毒物质测定一甲胺和二甲胺  测试谱图：



Determination of Toxic Substances in Workplace Air for Monomethylamine and Dimethylamine
Determination of Toxic Substances in Workplace Air for Monomethylamine and Dimethylamine Details:

name: glass column
Stationary phase: PEG-20M:KOH:Chromosorb 102=4:1:100
Specifications: 2m*3mm

Application: Determination of Toxic Substances in Workplace Air Part 227: Monomethylamine and Dimethylamine

Determination of Toxic Substances in Workplace Air Part 227: Monomethylamine and Dimethylamine
This section specifies the solution collection of monomethylamine and dimethylamine in workplace air - gas chromatography and solvent desorption - gas chromatography.
This section applies to the determination of gaseous monomethylamine and dimethylamine concentrations in workplace air.

Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. has established a headspace gas chromatography method for the determination of monomethylamine and dimethylamine in workplace air. Methods The monomethylamine and dimethylamine in the air were collected from the acidic absorbing liquid, neutralized by the alkali solution, and then injected into the headspace by gas chromatography. Results When the concentration range of monomethylamine was 11.70～93.54μg/ml, the regression equation of the standard curve was Y=0.458 1X-1.034 5(r=0.999 0); when the concentration range of dimethylamine was 10.59～84.74μg/ml, the standard curve The regression equation of is Y=0.864 5X-2.206 (r=0.999 1). The detection limit of monomethylamine method is 1.65μg/ml, and the minimum detection concentration is 0.55 mg/m3 (based on the collection of 15 L air samples); the detection limit of dimethylamine is 1.54μg/ml, and the minimum detection concentration is 0.32 mg/m3 (based on the collection of 24 L air samples). The samples can be stored stably for 5 days in a refrigerator at 4°C. Conclusion The method can simultaneously determine the concentrations of monomethylamine and dimethylamine in the workplace air.

Determination of Monomethylamine and Dimethylamine for Toxic Substances in Workplace Air Test Spectrum: